config/events.d/41.httpd

   1 #!/bin/sh
   2 # event script to manage httpd in a cluster environment
   3
   4 . $CTDB_BASE/functions
   5
   6 detect_init_style
   7
   8 case $CTDB_INIT_STYLE in
   9     redhat)
  10         service_name="httpd"
  11         service_config="http"
  12         ;;
  13     suse|debian|*)
  14         service_name="apache2"
  15         service_config="apache2"
  16         ;;
  17 esac
  18
  19 # RHEL5 sometimes use a SIGKILL to terminate httpd, which then leaks
  20 # semaphores.  This is a hack to clean them up.
  21 cleanup_httpd_semaphore_leak() {
  22     killall -q -0 "$service_name" ||
  23     for i in $(ipcs -s | awk '$3 == "apache" { print $2 }') ; do
  24         ipcrm -s $i
  25     done
  26 }
  27
  28 ##########
  29
  30 service_start="cleanup_httpd_semaphore_leak; service $service_name start"
  31 service_stop="service $service_name stop; killall -q -9 $service_name || true"
  32 service_reconfigure="service $service_name restart"
  33
  34 loadconfig
  35
  36 ctdb_start_stop_service
  37
  38 is_ctdb_managed_service || exit 0
  39
  40 case "$1" in
  41     startup)
  42         ctdb_service_start
  43         ;;
  44
  45     shutdown)
  46         ctdb_service_stop
  47         ;;
  48
  49     monitor)
  50         if ctdb_service_needs_reconfigure ; then
  51             ctdb_service_reconfigure
  52             exit 0
  53         fi
  54
  55         if ctdb_check_tcp_ports 80 >/dev/null 2>/dev/null ; then
  56             ctdb_counter_init
  57         else
  58             ctdb_counter_incr
  59
  60             ctdb_check_counter_equal 5 || {
  61                 echo "HTTPD is not running. Trying to restart HTTPD."
  62                 ctdb_service_stop
  63                 ctdb_service_start
  64                 exit 0
  65             }
  66             ctdb_check_counter_limit 10 quiet|| {
  67                 echo "HTTPD is not running. Trying to restart HTTPD."
  68                 ctdb_service_stop
  69                 ctdb_service_start
  70                 exit 1
  71             }
  72         fi
  73         ;;
  74
  75     *)
  76         ctdb_standard_event_handler "$@"
  77         ;;
  78 esac
  79
  80 exit 0
  81